Strain sensing Fabry-Perot interferometer and strain sensing method based on the interferometer

A strain sensing and interferometer technology, applied in the field of sensing, can solve problems such as poor stability, difficult manufacturing, and difficult design of cavity shape, and achieve the effects of easy manufacturing, improved sensitivity, and simple structure
CN110319786AActive Publication Date: 2019-10-11NANJING UNIV OF INFORMATION SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF INFORMATION SCI & TECH
Publication Date
2019-10-11

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Abstract

The present invention relates to a strain sensing Fabry-Perot interferometer, comprising a first single mode fiber, a second single mode fiber and a capillary microtube, wherein the capillary microtube is fused between the first single mode fiber and the second single mode fiber. The strain sensing Fabry-Perot interferometer proposed by the invention has the advantages of simple structure, convenient manufacturing and easy design of various cavity shapes. A strain sensing method based on the strain sensing Fabry-Perot interferometer is used for achieving a vernier effect by connecting two single-cavity fiber Fabry-Perot interferometers in parallel by using a fiber coupler, so that the sensitivity of strain sensing is improved.
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Description

technical field

[0001] The invention relates to the field of sensing technology, in particular to a strain sensing Fabry-Perot interferometer and a strain sensing method based on the interferometer. Background technique

[0002] Optical fiber sensors have the advantages of convenient application, anti-corrosion, anti-electromagnetic interference, compact structure, good stability, and high sensitivity. They have been widely used in various sensing fields, such as energy and environmental protection, industrial and mining enterprises, national defense, medical and health fields.

[0003] Among many fiber optic sensors, the fiber optic Fabry-Perot interferometer sensor has developed very rapidly due to its unique advantages of simple fabrication, good stability and high sensitivity, and has been applied in the sensing fields of temperature, refractive index, pressure and magnetic field. The Fabry-Perot interferometer consists of two parallel flat glass plates or quartz plates,...

Claims

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